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This is a 10. Wonderfully made, solid and durable. Nice focus ring, large enough and easy to grip. The throw is around 270º. It makes for slow AF, but creamy MF. The focus clamp helps with MF. A focus limiter would be nice.

Iq is the best I have seen. Wide open, or closed down, the lens delivers. No visible differences. Bokeh is perfect at all apertures. Images have beautiful contrast, and are razor sharp.

This is a macro lens, and it shows. It is my best lens regarding IQ and build quality.